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United States Patent | 5,249,928 |
Schulz | October 5, 1993 |
A fixed pitch propeller has blades that are not solely dependent on the blade angle dictated by the helical path of the blade tip. An outboard portion of the blade has a range of blade angles that are relatively flat to operate most efficiently at lower aircraft speeds. An inboard portion of the blade has a range of blade angles that are relatively high pitched to allow efficient operation at higher aircraft speeds
Inventors: | Schulz; William J. (152 Dibble Hill, West Cornwall, CT 06796) |
Appl. No.: | 762508 |
Filed: | September 19, 1991 |
Current U.S. Class: | 416/223R; 416/234; 416/DIG.2; 416/DIG.5 |
Intern'l Class: | B63H 001/26 |
Field of Search: | 416/223 R,234,238,242,DIG. 2,DIG. 5 |
3173490 | Mar., 1965 | Stuart | 416/223. |
3829240 | Aug., 1974 | Edenborough et al. | 416/223. |
5035377 | Jul., 1991 | Buchelt | 416/223. |
5035577 | Jul., 1991 | Damongeot | 416/223. |